Set default halo brightness to 25%.

src/app/MenuBar.cpp

@@ -456,7 +456,7 @@ struct HaloBrightnessQuantity : Quantity {
 		return settings::haloBrightness;
 	}
 	float getDefaultValue() override {
-		return 0.0;
+		return 0.25;
 	}
 	float getDisplayValue() override {
 		return getValue() * 100;

src/settings.cpp

@@ -28,7 +28,7 @@ bool invertZoom = false;
 float cableOpacity = 0.5;
 float cableTension = 0.5;
 float rackBrightness = 1.0;
-float haloBrightness = 0.0;
+float haloBrightness = 0.25;
 bool allowCursorLock = true;
 KnobMode knobMode = KNOB_MODE_LINEAR;
 bool knobScroll = false;